Natrobistantite

Formula: (Na,Cs)Bi(Ta,Nb,Sb)4O12

Origin of name: from composition

 

Crystal system: cubic

Crystal class: 4/m -3 2/m

Twinning: 

Unit cell: 

 

Colour: colourless, bluish- to yellowish-green

Diaphaneity: 

Luster: 

Habit: 

Hardness

Specific gravity: 6.1 to 6.2

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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